= Wiki Processors =
Processors are WikiMacros designed to provide alternative markup formats for the [TracWiki Wiki engine]. Processors can be thought of as ''macro functions to process user-edited text''.
The Wiki engine uses processors to allow using [wiki:WikiRestructuredText Restructured Text], [wiki:WikiHtml raw HTML] and [http://www.textism.com/tools/textile/ textile] in any Wiki text throughout Trac.
== Using Processors ==
To use a processor on a block of text, use a Wiki code block, selecting a processor by name using ''shebang notation'' (#!), familiar to most UNIX users from scripts.
'''Example 1''' (''inserting raw HTML in a wiki text''):
{{{
#!html

{{{
#!html
<h1 style="color: orange">This is raw HTML</h1>
}}}

}}}
'''Results in:'''
{{{
#!html

This is raw HTML

}}}
Note that since 0.11, such blocks of HTML have to be self-contained, i.e. you can't start an HTML element in one block and close it later in a second block. Use div or span processors for achieving similar effect (see WikiHtml).
----
'''Example 2''' (''inserting Restructured Text in wiki text''):
{{{
#!html

{{{
#!rst
A header
--------
This is some **text** with a footnote [*]_.
.. [*] This is the footnote.
}}}

}}}
'''Results in:'''
{{{
#!rst
A header
--------
This is some **text** with a footnote [*]_.
.. [*] This is the footnote.
}}}
----
'''Example 3''' (''inserting a block of C source code in wiki text''):
{{{
#!html

text

}}}
}}}
The result will be syntax highlighted HTML code:
{{{
#!text/html

text

}}}
The same is valid for all other mime types supported.
For more processor macros developed and/or contributed by users, visit:
* [trac:ProcessorBazaar]
* [trac:MacroBazaar]
* [th:WikiStart Trac Hacks] community site
== Advanced Topics: Developing Processor Macros ==
Developing processors is no different from Wiki macros. In fact they work the same way, only the usage syntax differs. See WikiMacros for more information.
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See also: WikiMacros, WikiHtml, WikiRestructuredText, TracSyntaxColoring, WikiFormatting, TracGuide